maximum

noun

max·​i·​mum ˈmak-s(ə-)məm 

plural maxima ˈmak-sə-mə  or maximums ˈmak-s(ə-)məmz 

1

a

: the greatest quantity or value attainable or attained

b

: the period of highest, greatest, or utmost development

2

: an upper limit allowed (as by a legal authority) or allowable (as by the circumstances of a particular case)

3

: the largest of a set of numbers

specifically : the largest value assumed by a real-valued continuous function defined on a closed interval

maximum adjective

Synonyms of maximum

• max
• most
• utmost

Examples of maximum in a Sentence

achieved the maximum

Recent Examples on the Web

The first offense carries a maximum of a year in county jail, according to the bill. —Mark Dee, Idaho Statesman, 28 Mar. 2026

The penalty accrues up to a maximum of 25%. —Kat Tretina, Sacbee.com, 27 Mar. 2026

The 63-year-old social services worker, who lives in rural Illinois, said her monthly premium payments more than doubled, from roughly $1,100 to $2,333, for a plan with a $10,150 out-of-pocket maximum. —Tribune News Service, Boston Herald, 27 Mar. 2026

Both face a maximum of 20 years in prison and potentially will be ordered to pay hefty fines and restitution orders. —Alex Riggins, San Diego Union-Tribune, 27 Mar. 2026

Word History

Etymology

Latin, neuter of maximus biggest — more at maxim

First Known Use

1663, in the meaning defined at sense 1a

Phrases Containing maximum

• maximum likelihood
• maximum occupancy
• maximum security prison

Kids Definition

maximum

noun

max·​i·​mum ˈmak-s(ə-)məm 

plural maxima -sə-mə  or maximums

1

: the highest quantity, value, or development

2

: an upper limit allowed

maximum adjective

Medical Definition

maximum

noun

max·​i·​mum ˈmak-s(ə-)məm 

plural maxima -sə-mə  or maximums

1

a

: the greatest quantity or value attainable or attained

b

: the period of highest, greatest, or utmost development

2

: an upper limit allowed (as by a legal authority) or allowable (as by the circumstances of a particular case)

maximum adjective